Log Of Materialized View - Trigger Not Working Properly

I have created a Table and a log of materialized view in an Schema SchemaAA of Server A

CREATE TABLE TABLA_TEST
(
TEST_PK NUMBER,
TEST_TEXTO VARCHAR2(50),
CONSTRAINT PK_TEST PRIMARY KEY (TEST_PK)
);

CREATE MATERIALIZED VIEW LOG ON TABLA_TEST;

I have created a DB Link from server B with user REPLIC

I have granted SELECT to REPLIC to the table and the log materialized View.

I have created a table in instanceBA of Server B

CREATE TABLA_TEST
(
HOSPCODE NUMBER(3),
TEST_PK NUMBER,
TEST_TEXTO VARCHAR2(50),
FECHA_INSERT DATE,
FECHA_UPDATE DATE,
FECHA_DELETE DATE,
CONSTRAINT TTEST_PK PRIMARY KEY (HOSPCODE, TEST_PK);

I have created a materialized view in schema SchemaBB of Server B with a trigger

CREATE MATERIALIZED VIEW WORKAREA.TABLA_TEST70
BUILD IMMEDIATE
REFRESH FAST ON DEMAND
WITH PRIMARY KEY
AS
SELECT TEST_PK,
TEST_TEXTO
[code].........

All schemas have the appropriate grants.

When inserting in TABLA_TEST (SchemaAA) and refreshing MView TABLA_TEST70 things go nicely.

But, when updating a record in the original TABLA_TEST and refreshing the MView the results in TABLA_TEST in SchemaBA are as if I have deleted the record (FECHA_DELETE is set to SYSDATE).